Summary of Significant Accounting Policies (Narrative) (Details) (USD $)	0 Months Ended	12 Months Ended			13 Months Ended	12 Months Ended					0 Months Ended	12 Months Ended
	Apr. 08, 2013	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013	Dec. 31, 2013 Stock Options [Member]	Dec. 31, 2012 Stock Options [Member]	Dec. 31, 2011 Stock Options [Member]	Dec. 31, 2012 Potentially Dilutive Shares [Member]	Dec. 31, 2011 Potentially Dilutive Shares [Member]	Mar. 01, 2013 Subsequent Event [Member]	Dec. 31, 2013 December 2012 Share Repurchase Agreement [Member]	Dec. 03, 2013 December 2012 Share Repurchase Agreement [Member]	Dec. 31, 2012 December 2012 Share Repurchase Agreement [Member]	Dec. 31, 2013 Fair Value, Inputs, Level 1 [Member]	Dec. 31, 2012 Fair Value, Inputs, Level 1 [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Money Market Funds, at Carrying Value		$ 14,001,000	$ 837,000		$ 14,001,000
Stipulation of settlement, payment to plaintiff, warrants	250,000		250,000
Cash and Cash Equivalents, Fair Value Disclosure															837,000	14,001,000
Asset Impairment Charges		0	0	0
Expected volatility rate											46.00%
Risk free interest rate											1.70%
Stipulation of Settlement, payment to plaintiff, warrants, term	5 years	5 years
Warrants, fair value per share											4.96
Antidilutive securities excluded from computation of earnings per share (in shares)						325,800	416,300	404,800	4,400	37,800
Stock repurchase program, authorized amount													10,000,000
Purchase of treasury shares					302,178							262,000		40,000
Purchase of treasury shares, value		3,884,000	3,257,000	425,000	3,000,000							2,600,000		400,000
Fair Value Adjustment Of Warrants		150,000
Prepaid expenses included in other assets		1,500,000	1,800,000		1,500,000
Cost of sales related to service revenue		34,100,000	33,600,000	29,100,000
Advertising Expense		$ 1,100,000	$ 1,200,000	$ 1,300,000